Historically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A recent Gallup Poll of 2500 people showed 1723 in favor of stricter gun control laws . Assume the poll was given to a random sample of people. QUESTION Test the claim that the proportion of those favoring stricter gun control has changed from 0.55. Perform a hypothesis test, using a significance level of 0.01.     Do you retain or reject the null hypothesis?

What is the relationship between the t-test and the sample size? (i.e., when will a t-test be more likely to be significant/you would reject the null)?

In 2005, Health Canada claimed that 16.9% of Canadian adults are obese. A researcher wanted to check whether this percentage has changed in 2009. In 2009, he randomly selected 90 Canadian adults and found 12 of them are obese. Use a 7% significance level. The decision rule is either       Reject Ho if Zcalc > 1.48     Reject Ho if Zcalc > 1.81     Reject H0 if Zcalc < -1.81 or Zcalc > 1.81     Reject H0 if Zcalc < -1.48 or Zcalc > 1.48

A study investigated various aspects of drug use among pregnant women: With 95% Confidence, identify if there is an Inference / Difference between both samples.   Did the mother use Marijuana?       Yes   No Low Birth Weight 90   512 Total Babies 822   6648

Claim more than 25% of a class is majoring into Nursing (or Nursing-BSN). Test at the 0.5 significance level. Complete the full hypotheses test answering all the questions here. You can use the traditional or p- value method. Sort out the data. 1. What type of test will need to be used? 2. What is the sample size, n, for major? How many business (including business management) majors, X? Use "=counta" instead of "=count" to count qualitative data 3. Hypothesis test . . • Hypotheses • Ho Ha Critical value* ← Test Value (or p-value) Decision *Skip if your using the p-value method. Summary/conclusion 4. Is there a possible type I or type II error? 5. What can you conclude about business majors from this hypothesis test?

Please help. Thanks so much.

A pollof 2000 randomly selected students in grades 6 through 8 was conducted and found that 48% enjoy playing sports. Is the 48% result a statistic or a parameter?

Portland State University (PSU) reported that 64% of their students receive financial aid. A PSU administrator feels that their school may have a different proportion compared to all of Oregon schools. A random sample of 409 students in Oregon found that 259 receive financial aid. Test the claim that proportion of students that receive financial aid in Oregon is different than PSU. Use a 1% significance level. Give answer to at least 4 decimal places. a. What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.) Ho: Select an answer ?v H₁: Select an answer ? ✓ Based on the hypotheses, compute the following: b. Test Statistic = c. p-value = d. Based on the above we choose to Select an answer e. The correct summary would be: Select an answer that the proportion of students that receive financial aid in Oregon is different than the PSU reported value of 64%.

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According to the most recent General Social Survey, 70% of adults watch TV nightly. A researcher believes that the proportion of college students who watch TV nightly is less than this. To test this claim the research samples 400 college students and finds that 276 watch TV nightly. At the 0.05 level of significance does this data provide evidence to suggest that the proportion of college students who watch TV nightly is less than 70%? What is the p-value for this hypothesis test? Round to three decimal places.